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Input needed - How to present heat treat info in the knife steel app

Hi All,

I suppose main audience for this question would be makers and heat treaters, although anyone else interested in heat treating data or having any feedback is more than welcome to comment.

Long story short, asm international contacted me regarding my app, and offered some help with info, of course I am quite proud that the largest scientific group in materials science took interest Anyhow, based on all that I am considering adding HT info to the app, or another version of it.
Unfortunately, I have never done or studied HT, just researched few things on the net here and there, which isn't nearly enough. I don't plan to do HT myself, but what I do want to know what is acceptable/useful information on heat treating given alloy.

I've seen different formats, starting from few numbers like this on Crucible HT page and ending with pdf files having 2-3 pages of more detailed information including charts and diagrams.

Obviously, I can not include few thousand pfd files in my app, even if i had all of them. On the other hand, it is unlikely that someone will need all of them anyway. My goal is to provide useful set of information which is enough for a maker or heat treater...

For example, if I have the following info on 1040 steel, is it enough for you to work with or diagrams are necessary?

AISI 1040 steel (composition and cross reference data as in the current app)

Hardening. Heat to 845 ‘C ( IS55 “F). Flame hardening carbonitriding.
and liquid carburizinp are suitable surface hardening processes. Quench in
water or brine. Rounds less than 6.35 mm (I/-l in.) diam may he oil
quenched for full hardness

Tempering After Hardening. As-quenched hardness of approximately 52 HRC. Hardness can be reduced by tempering

Tempering After Normalizing. For large sections. normalize by
comentional practice. This results in a structure of line pearlite. A tempering
treatment up IO about 510 ‘C ( IO00 “F) is then applied. Mechanical
properties not equal to those achieved by quenching and tempering. Resulting
strength is far higher than that of annealed structure. Normalizing and
tempering often applied to heavy forgings

It plots the temperature versus the log of time, and the curves will show you the tranformations that result from different cooling rates.

Here is an example for 1095.

To get martensite, the cooling rate has to be quick enough to avoid that curve, so at the quickest, 0.8 seconds or so around 1050 F. Different microstructures/combinations of microstructures will result with touching into the curve.